Digital Elevation Model from Single-Beam Bathymetry XYZ Data Collected in 2015 from Raccoon Point to Point Au Fer, Louisiana

As part of the Barrier Island Comprehensive Monitoring Program (BICM), scientists from the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center conducted a nearshore single-beam bathymetry survey along the south-central coast of Louisiana, from Raccoon Point to Point Au Fer Island, in July 2015. The goal of the BICM program is to provide long-term data on Louisiana’s coastline and use this data to plan, design, evaluate, and maintain current and future barrier island restoration projects. The data described in this report will provide baseline bathymetric information for future research investigating island evolution, sediment transport, and recent and long term geomorphic change, and will support modeling of future changes in response to restoration and storm impacts. The survey area encompasses more than 300 square kilometers (km2) of nearshore environment from Raccoon Point to Point Au Fer Island. This data series serves as an archive of processed single-beam bathymetry data, collected from July 22–29, 2015, under USGS Field Activity Number 2015-320-FA. Geographic information system data products include a 200-meter-cell-size interpolated bathymetry grid, trackline maps, and point data files.

作为屏障岛综合监测计划（Barrier Island Comprehensive Monitoring Program, BICM）的一部分，美国地质调查局（U.S. Geological Survey, USGS）圣彼得堡海岸与海洋科学中心的科研人员于2015年7月，沿路易斯安那州中南部海岸从浣熊点（Raccoon Point）至奥弗角岛（Point Au Fer Island）开展了近岸单波束水深测量（single-beam bathymetry）作业。该计划的核心目标是获取路易斯安那州海岸的长期监测数据，并依托这些数据规划、设计、评估及维护当前与未来的屏障岛修复工程。本报告所载数据将为后续研究提供基准水深信息，相关研究可覆盖岛屿演化、泥沙运移以及近期与长期地貌变化等方向，同时可为模拟修复工程与风暴影响下的未来海岸变化提供支撑。本次测量覆盖的近岸海域范围从浣熊点至奥弗角岛，总面积超过300平方千米（km²）。本数据集为2015年7月22日至29日期间采集的经过处理的单波束水深测量数据归档，对应USGS野外活动编号为2015-320-FA。配套的地理信息系统（Geographic Information System, GIS）数据产品包含200米格网分辨率的插值水深栅格、测线地图以及点数据文件。